cardboardamerica:

Grand Hotel - Mackinac Island, Michigan

A beautiful dive into the famous Serpentine Pool at the elegant Grand Hotel on Mackinac Island, Michigan. The pool is open to the public for sunbathing and swimming.

Mailed from Hulbert, Michigan to Mrs. David Miller of Harbor Beach, Michigan on August 6, 1965:
Having a nice time. We didn’t stay at this Hotel. Couldn’t afford to. Going for a boat ride today. Write. Hope all are well.
Bertha